Cisco Cisco NAC Appliance 4.8.3 Release Notes

The following steps summarize how to perform new CD software installation of Release 4.8(3) on 
supported Cisco NAC Appliance hardware platforms (see 

 for additional support details).

To upgrade on an existing Cisco NAC Appliance, refer to the instructions in 

. 

The click in the NAC is configured with default settings like default priority, CPU usage etc. The driver 
loop of the click thread uses the full CPU whenever other processes are idle. The CPU usage of click can 
reach 99%. As the thread runs with default priority, other processes like tomcat can take over whenever 
requests come for them. The high CPU usage of click will not lead to any performance issues.

CSCts35334

Yes

CCA Agent Downloading Optional Language Packs.

On certain OS' when the CAM is using a WSUS requirement pointing to 
Microsoft Servers to install only Critical Updates, optional language 
packs are being installed during remediation.

None.

CSCtt93822

Yes

AV/AS handling should use more than ProductID for identification.

AS definition check fails on the system if MS Security Essentials and 
Windows Defender are installed.

None.

CSCty39040

Yes

VLAN Detect doesn't detect network interface, NAC Agent 4.8.3

When a client having 4.8.3 Agent is connected to a NAC 4.8.2 
Appliance, it is not authenticated properly. VLAN Detect is not 
detecting the network interface.

CSCtz23958

Yes

ENH: NAC agent in L3-OOB is not compatible with Citrix VPN Client

When VLAN Detect is enabled, Citrix VPN connections do not connect 
if NAC agent is running on PC.

If clients are not behind IP phones, then disable VLAN Detect.

Close NAC Agent from the taskbar, before connecting to VPN. This 
requires the traffic to VPN endpoint to be enabled in 
unauthenticated role.